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Radian® 3RXT® SafePlus® Max

Our best-selling car seat, now with improved safety features

$349.99
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Our best-selling and most loved 3 Across All-In-One™ convertible car seat, now improved. Up to 10 years of use, optimized safety and new 2-in-1 anti-rebound bar and calf support, the Radian® 3RXT® SafePlus® Max is top-tier in comfort and protection.

Features:

  • 10 Years 1 Car Seat® - From birth to booster (4-120 lb.) it's all you will need. Grows with your child with ultimate protection on every road trip. Complete with 4 modes in 1 seat!
  • SafePlus® Engineering - Allows for rear-facing up to 50 lb., with 3 modes of newborn protection, and 2-in-1 anti-rebound bar and calf support to reduce rebound rotation.
  • Fits 3-Across - Our famous slim-fit design with SafePlus® 8-layer side impact protection and zero compromises to safety, space, or comfort.
  • Reinforced Automotive Grade High-Strength Steel Core - Complete with multi-position calf support, our unique core shell shields and protects your child.
  • Convenience & Comfort - One hand easy-adjust 12-position headrest and memory foam, washable seat cover for busy families on the go.
  • Travel Approved - The original and only all-in-one convertible car seat that folds for travel or compact storage and FAA approved for airline use.
  • Bonus - Includes two (2) cup holders to keep beverages close!
12 months standard warranty
What's in the box?
Radian® 3RXT® SafePlus™ Max Car Seat, Anti-Rebound Panel, Rear-Facing Base, Comfort Harness Pads, Side Impact Management Pod, comfort Insert, Cup Holder, Crotch Buckle Cover, Car Seat Manual and Registration Cards
What Diono® Accessories do you recommend?
Accessories that pair well with the Radian® 3RXT® SafePlus™ Max include: The Ultra Mat, Stow n’ Go, Easy View Mirror and See Me Too Mirror.
Can I use other brands' accessories or spares parts?
No. Always follow our guidelines regarding use of items not included with the child restraint. We only recommend using accessories and spare parts from Diono® as all of these have been tested for use.
Should I read my product manual?
Yes, you should always read your Radian® 3RXT® SafePlus™ Max product manuals and the vehicle's instruction manual that you plan to install it in before use. Find more information here.
Where do I find my product manual?
Your manual is attached to the seats harness straps when you open the box. After you have read it, you must store the car seat manual in the storage compartment flap on the backside of the seat.
Is this all-in-one convertible car seat suitable for my newborn?
Yes, you can use your Radian® 3RXT® SafePlus™ Max for a newborn. We recommend rear-facing from 5 to 50 lb, about 4 years old. Radian® 3RXT® SafePlus™ Max comes with an infant positioning liner and travel high wedge that you can use for your newborn.
Is this all-in-one convertible car seat suitable for my toddler?
Yes, you can use your Radian® 3RXT® SafePlus™ Max car seat for your toddler. We recommend rear-facing until 50 lb and then forward-facing from 50 lb to 65 lb forward-facing in the 5-point harness.
Is this all-in-one convertible car seat suitable for my big kid?
Yes, you can use your Radian® 3RXT® SafePlus™ Max for your big kid. We recommend forward-facing in the 5-point harness until 65 lb and then as a high back booster until 120 lb.
Does this product fit 3 across?
Minimum of 51 in is needed between the car's interior structures to fit your Radian® 3RXT® SafePlus™ Max. Radian® car seats fits 3-across in most mid-sized sedans. Learn more here.
What is the rear facing anti rebound bar/2in1 rebound panel?
The anti-rebound panel reduces rearward rotation of the car seat by up to 50% in the event of a crash. This ensures your child stays protected after the primary impact of the collision.
Do you use flame retardants?
Our car seat fabrics are tested to ensure they do not contain any legally restricted harmful flame retardants. We do not use Brominated or Chlorinated flame retardants in any of our car seats.
Does this product meet NHTSA and CMVSS regulations?
Safety is paramount. Diono® ensures compliance with US Federal Motor Vehicle Safety Standards (FMVSS), US National Highway Traffic Safety Administration (NHTSA), and Canadian Motor Vehicle Safety Standards (CMVSS), regularly testing all car seats.
How long can I use my Radian® car seat rear-facing?
Your Radian® 3RXT® SafePlus™ Max can be used rear-facing up to 50 lb or 44 in. We encourage rear-facing as long as possible since it is the safest way for children to travel!
How long can I use my all-in-one convertible car seat forward-facing?
You can use your Radian® 3RXT® SafePlus™ Max until 65 lb forward-facing with the 5-point harness and then until 120 lb as a high-back booster.
How much space is needed to use my Radian® car seat rear-facing?
Your Radian® 3RXT® SafePlus™ Max uses 30-36 in between the vehicle's backseat and front seat back, depending on the vehicle's seat shape and contour.
When does my car seat expire?
The Radian® 3RXT® SafePlus™ Max has a life span of 10 years, starting from the time of purchase. If the date of purchase cannot be determined, then we use the date of manufacture.
Why is my Radian® car seat heavy?
Your Radian® is heavy due to Diono®'s commitment to safety with our reinforced automotive-grade high-strength steel core. Since it's launch, Radian®'s core has been protecting generations of kids daily.
Do Radian® car seats fold flat?
Diono® is the only car seat manufacturer to offer a folding convertible car seat. This makes it the perfect travel seat as it is so compact and folds into a handy car seat travel backpack.
Why does my Radian® have such a low seat base?
Your Radian® has a low seat base because as your child grows, they will want to get in and out of your car themselves. This low height makes it very easy for them to get into their seat before you harness them up.
Why do the side wings on my Radian® expand?
The side wings on the base expand as your child grows. Parents and Kids really love this feature on the Radian® 3RXT® SafePlus™ Max as it makes travel so much easier.
Product Care:
Covers: Machine wash cold, line dry. Shell and Components: Spot clean
Minimum User Weight:
4 lb
Maximum User Weight:
120 lb
Minimum User Weight - Rear Facing:
4 lb
Maximum User Weight - Rear Facing:
50 lb
Maximum User Weight - Rear Facing LATCH:
35 lb
Minimum User Weight - Forward Facing:
26.5 lb
Maximum User Weight - Forward Facing:
65 lb
Maximum User Weight - Forward Facing LATCH:
40 lb
Minimum User Weight - Booster:
40 lb
Maximum User Weight - Booster:
120 lb
Maximum User Height:
57.5 in
Product Height:
28.5 in
Product Width:
17 in
Product Depth:
16 in
Product Height - Folded:
28.5 in
Product Width - Folded:
17 in
Product Depth - Folded:
11.5 in
Seat Weight:
31.9 lb
Number of Head Support Positions:
12

More about the Radian® 3RXT® SafePlus® Max

Our automotive grade, high-strength steel core is designed for ultimate safety and engineering to protect your child

Ten Years One Car Seat®- from birth to booster, it’s all you need to protect your child up to 120lbs 

2-in-1 anti-rebound bar and calf support to reduce rebound rotation in case of an accident

Our famous 17” slim fit design fits 3-across in most midsized sedans and up

!